Synthesis of monolithic carbon aerogels with high mechanical strength via ambient pressure drying without solvent exchange

doi:10.1016/j.jmst.2020.02.013

IMR OpenIR

	Synthesis of monolithic carbon aerogels with high mechanical strength via ambient pressure drying without solvent exchange
	Yang, Zhi 1,2; Li, Jian 1; Xu, Xiaojing 3; Pang, Shengyang 1; Hu, Chenglong 1; Guo, Penglei 1,2; Tang, Sufang 1; Cheng, Hui-Ming 1
通讯作者	Tang, Sufang(sftang@imr.ac.cn)
	2020-08-01
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	50 页码:66-74
摘要	A simple, fast and cost-effective method for monolithic carbon aerogels (CAs) preparation was proposed through sol-gel polycondensation of resorcinol with formaldehyde in a basic aqueous solution followed by ambient pressure drying without solvent exchange, and carbonization. The microstructure and network strength of CAs were tailored by adjusting the catalyst concentration ([resorcinol]/[sodium carbonate] in the range of 300-2000), water content ([deionized water]/[resorcinol] equals to 17 and 24, respectively), and gelation temperature (T(gel )in the range of 30-90 degrees C). Resultantly, the CAs with a wide range of density (0.30-1.13 g/cm(3)), high specific surface area (465-616 m(2)/g), high compressive strength (6.5-147.4 MPa) and low thermal conductivity (0.065-0.120 W m(-1) K-1) were obtained in this work. Moreover, the largesized CAs (100 x 100 x 20 mm(3)) can also be prepared by this method since the formed robust skeleton network can resist shrinkage/collapse of pore structure and prevent cracking during drying. The improved mechanical strength and monolithic forming abilities could be mainly attributed to the uniform arrangement of carbon particles and pores, fine particle size, abundant network structure and enhanced particle neck. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	Carbon aerogels Ambient pressure drying High mechanical strength Thermal insulation
资助者	Major Program ofAerospace Advanced Manufacturing Technology Research Foundation of NSFC ; CASC, China ; National Natural Science Foundation of China ; National Science and Technology Major Project ; Research Fund of Youth Innovation Promotion Association of CAS, China ; National Key R&D Program of China
DOI	10.1016/j.jmst.2020.02.013
收录类别	SCI
语种	英语
资助项目	Major Program ofAerospace Advanced Manufacturing Technology Research Foundation of NSFC ; CASC, China[U1537204] ; National Natural Science Foundation of China[51802313] ; National Natural Science Foundation of China[51902315] ; National Science and Technology Major Project[2017-VI-0020-0093] ; Research Fund of Youth Innovation Promotion Association of CAS, China[2014171] ; National Key R&D Program of China[2018YFF01013600]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000537588800007
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：28[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/139133
专题	中国科学院金属研究所
通讯作者	Tang, Sufang
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 3.China Acad Launch Vehicle Technol, Aerosp Business Dept, Beijing 100076, Peoples R China
推荐引用方式 GB/T 7714	Yang, Zhi,Li, Jian,Xu, Xiaojing,et al. Synthesis of monolithic carbon aerogels with high mechanical strength via ambient pressure drying without solvent exchange[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020,50:66-74.
APA	Yang, Zhi.,Li, Jian.,Xu, Xiaojing.,Pang, Shengyang.,Hu, Chenglong.,...&Cheng, Hui-Ming.(2020).Synthesis of monolithic carbon aerogels with high mechanical strength via ambient pressure drying without solvent exchange.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,50,66-74.
MLA	Yang, Zhi,et al."Synthesis of monolithic carbon aerogels with high mechanical strength via ambient pressure drying without solvent exchange".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 50(2020):66-74.